Vacation-Sigma 17-70 os or Canon 18-135?

I also have a 70-200 L also, but this is a family vacation, really want to go compact, and pictures will be family, beach mostly.
Has anyone had both.
I just got the Sigma recently with no time to really try it out, so I am not sure if it will WOW me vs IQ on the 18-135...I have been somewhat pleased on what the Canon does, and the range is fantastic.
Would like to hear hands on experience with both lenses, I have read all the reviews.

Help me chose, either one fits in a small Tamrac Velocity 6, which is what I am going to carry,

Thanks

had the 18-135. it's definitely pretty good for a kit lens, but the variable aperture to 5.6 get's aggravating. i'd go with the sigma and just bring your 70-200 (not that heavy of a lens)

robtk wrote in post #12734511
had the 18-135. it's definitely pretty good for a kit lens, but the variable aperture to 5.6 get's aggravating. i'd go with the sigma and just bring your 70-200 (not that heavy of a lens)

Yeah, the problems is, I sold my Tamrac 8x, which held that combo, and bought a crumpler 5 million, and I don't feel it protects my stuff that well for a plane trip, beach stuff. So I am stuck with a small Velocity 6x, which fits my 50d, and one of these lenses.

Never heard someone complaining about lack of protection from a crumpler bag, usually the opposite! Depends on whether you feel you want the slightly faster aperture of the sigma or the longer reach of the 18-135. If you're planning on shooting indoors, then maybe the sigma would be better, but if outdoors, then the 18-135 would be a good choice.